Flashing structure



June 23, 1931. s. H. COHEN E-r AL 1,811,039

FLASHING STRUCTURE Filed July 25, 1928 Patented June 23, 1931 UNITED STATES MT1-:NTy OFFICE J I SAMU EL H. COHEN, OF MALDEN', .AND JACOB WASSIERJYIAN,v OF CAMBRIDGE,

. MASSACHUSETTS :smsHiNG STRUCTURE Application led July 28, 1928. Serial No. 294,631.

This invention relates to flashing, so-called,

made of non-corrodible sheet metal such as copper, zinc, or the like, and used in brick or stone walls where there is tendency for water to seep through the wall and injure the ceilings and interior walls of the build ing, as, for instance, where a roof comes in contact with the walls or where va chimne shaft or other object comes through a roo It has heretofore been the practice to use at sheet metal sections as flashing, the sections being 'soldered together at their end portions `and being embedded in the mortar Joints with their side marginal portions folded up' or down against a face of the wall,

as may be reguired. One of the major dis-v advantages o such flashing, is that it weakens the bond between the bricks or stones where it is used, there being comparatively little bond between the flatsurfaces of the section and the mortar.

i One of the objects of the present invention 1s to provide flashing which does not impair the mortar bond between the bricks or stones where such flashing is used. This object is attained by providin the flashing with noncorrodible metallic eying' material, as in the form of expanded metal lath, wire cloth or screening, chicken wire, or the like, which serve to ke or bond firmly with the mortar longitu inally and laterally. Preferably the keying material 'overlies both faces of the flashing and is uniformly distributed throughout the sections, so that a firm bond lath, which is, as stated, non-corrodible, ma

of the sections with the mortar is ensured.

`Further features and advantageous details and combination of parts will appear from the following more complete description of certain embodiments of the invention 4o shown on the accompanying drawings,

wherein Figurel shows in perspective a section of flashing provided with expanded metal lath. Figure 2 is a similar view of a fragment of the lath.

Figures 3 and 4 illustrate certain ste s in the assembly of the section with the lat Figures 5 and 7, respectively, show perspective views of modified constructions, partly broken away.

Figure 6 represents a fragmentary section through another modification.

Figure 8 represents a section through a wall in which the flashing' of the present invention is used. 55

Referring in detail first to Figure 1 of the drawings, 1 represents a section of ashing made of suitable non-corrodible imperforate sheet metal such as copper, which constitutes the base portion. This metal base has a '60 .series of pleats 2 formed transversely thereof and defining a series of transverse zones of metal 3, arranged in parallel planes, the

zones lying alternately in the upper and lower planes. Associated with each zone isy non-corrodible, metallic keying' material, which may take the form of sections of expanded metal lath 4, held in place at their side marginal portions by engagement in the folds of the pleats 2. These sections lie above and under the faces of the alternate zones, and are located in planes intermediate the planes of the alternate zones. Such a uniform distribution of the lath throughout the entire base ensures la firm bond of the flashing with the mortar and is particularly advantageous in that it requires a minimum amount of metal lath, which is retained in place only by the material of the base. The

consist of the ordinary expanded metal lat coated with a protecting layer of lead., One end portion 6 of the base 1 of the fiashing is preferably formed for overlapping engagement with the corresponding end portion of a similar dashing or section thereof, being shown provided with a transverse rib 7 of triangular form, which is adapted to take over a complemental rib 8 formed in an adjacent section, as shown in Figure 8.

In malng the section described, a flat blank of suitable sheet metal of the desired dimensions may be drawn or shaped to a form comprising transverse zones of metal 3, set `off alternately on different parallel planes by wall portions 10, which, as shown in Figure 3, preferably rise alternately at supplemental obtuse and acute angles from the zones of metal at the lower plane to the zones of the upper plane. Sections of lath 4, which are of sufficient width to overlie the zones, are then applied to the upper faces of the lower zones of metal and the under faces of the upper zones of metal, being held from falling out during handling at their side edges by the inclined Wall portions 10.

The section and lath thus assembled may then be pressed to produce a series of transverse folds 2 at the wall portions in which the side marginal portions of the sections of lath are engaged, as illustrated in Figure 4.

If desired, the flashing section may be flat and provided with metallic strand or ribbon material suitably fastened to both its faces. For example, as shown in Figure 6, sections of metal lath 13 may be fastened as by spot- Welding alternately on the upper and under faces of a flat flashing base 12 to produce a series' of transverse bonding or keying zones. Or, as shown in Figure 7, similar bonding zones may be produced by overlaying the base 12 with transversely extending wires 0r ribbons 15 hooked at their ends 16 to engage with the side edges of the section.

While we have described sections of flashing which are provided with metallic keying material to form a series of bonding zones alternately on the upper and under faces thereof, which ensure a uniformly firm bonding of the sections with the mortar, it is to be understood that both the upper and under faces of a section may be provided with such material, although in actual practice the constructions illustrated on the drawings, which require the use of about half as much metallic keying material, have been found to be quite satisfactory.

Owing to the lack of a better Ageneric term, by the expression metallic keying material as employed in the appended claims, is meant any suitable keying material, such as expanded metal lath, wire cloth or screening, chicken wire, or the like, with which the mortar may be keyed to the flashing, without the necessity of perforating the flashing or flashing base.

Having thus described certain embodiments of this invention, it will be evident t0 those skilled in the art that various changes or modifications might be made therein without departing from the spirit or scope of the invention as defined by the appended claims.

What we claim is: 1. An article of manufacture 'consisting of a section of flashing of non-corrodible,

imperforate sheet metal provided with metallic keying material which serves to key with the mortar where such flashingis used, said keying material being of the character of metal lath, wire cloth, chicken wire, or the like, whereby said flashing may be keyed to said mortar longitudinally and laterally.

2. An article of manufacture consisting of a vsection of flashing of non-corrodible, imperforate sheet metal provided with metallic keying material on both its faces, which serves to key with the mortar where such flashing is used, said keying material being 'of the character of metal lath, wire cloth, chicken wire, or the like, whereby said flashing may be keyed to said mortar longitudinally .and laterally.

3. An article of manufacture, consisting of a section of flashing of non-corrodible, imperforate sheet metal provided with metallic keying material in a series of transverse zones alternately on its upper and under faces, said keying material being of the character of metal lath, wire cloth, chicken wire, or the like, whereby said flashing may be keyed to a bonding composition, such as mortar, both longitudinally and laterally.

4. An article of manufacture consisting of a section of flashing of non-corrodible, imperforate sheet metal provided with metallic keying material on its upper and under faces, said keying material being uniformly distributed substantially throughout the entire section, and being of the character of metal lath, wire cloth, chicken wire, or the e 5. An article of manufacture consisting of` a section of flashing of non-corrodible, imperforate sheet metal carrying metallic keying material retained in place by folds in e said flashing.

6. An article of manufacture consistmg of a section of flashing of non-corrodible, imperforate sheet metal having a ser1es of transverse pleats defining transverse zones of metal arranged in different planes, the zones lying alternately in the upper and lower planes, and metallic keying material lying above and under the faces of the alternate zones in planes intermediate the planes of the alternate zones, said material being held in place by engagement 1n the folds of said pleats.

7. An article of manufacture consisting of a section of flashing of non-corrodible, imperforate sheet metal having a series of transverse pleats defining transverse zones of metal arranged in different planes, the zones lying alternately in the upper and lower planes, and metallic keying material 'in the folds of said pleats, one end portion of said section being provided With a transverse rib adapted to take over a complemental rib of a similar section.

8. An -article of manufacture consisting of a flashing base of non-corrodible, imperforate sheet metal, provided with sections of metal lath alternately on its opposite faces, said sections being distributed substantially throughout the entire base.

In testimony whereof we have aixed our signatures.

SAMUEL H. COHEN. JACOB WASSERMAN. 

